7 Reference information
7.4. Screw joints
407
3HAC026876-001 Revision: F
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7-2010 ABB.
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The table below specifies the recommended standard tightening torque for Molycote-
lubricated screws with Allen head screws.
The table below specifies the recommended standard tightening torque for water and air
connectors when one or both connectors are made of brass.
Dimension
Tightening torque (Nm)
Class 10.9, Molycote-lubricated
Tightening torque (Nm)
Class 12.9, Molycote-lubricated
M8
28
35
M10
55
70
M12
96
120
M16
235
280
M20
550
M24
790
950
Dimension
Tightening torque
Nm - Nominal
Tightening torque
Nm - Min.
Tightening torque
Nm - Max.
1/8
12
8
15
1/4
15
10
20
3/8
20
15
25
1/2
40
30
50
3/4
70
55
90
Continued